Supporters of the Campaign for a Healthy Denver prepare in the lobby of the Denver Elections Division in July as they submitted petition signatures to get a measure on the November ballot to require employers to provide paid sick leave.

The major players — and payers — in Denver’s paid-sick-leave battle at Tuesday’s ballot box have had skirmishes before and will meet again.

At issue is Initiative 300, a measure that would require Denver businesses to give workers one hour of paid sick leave for every 30 hours of work, with the amount capped at nine sick days annually for companies with 10 or more employees and five sick days annually for smaller businesses.

The two main contenders are the 9to5, National Association of Working Women, and the National Restaurant Association.

They’ve met on the paid-sick- leave battlefield in places such as Seattle, San Francisco, Philadelphia, Milwaukee and Washington, D.C.

“The circumstances are different in Denver. This involves a ballot initiative where they have gone directly to the voter,” said Scott DeFife, executive vice president of policy and government affairs for the National Restaurant Association.

In other cities and states, the efforts have come through elected bodies.

DeFife said the Denver fight has required getting to voters materials that he said point out that “this is a very labor-intensive industry with a very thin operating margin, and any sort of a mandatory benefit will likely increase operating costs and decrease the ability to create jobs.”

Those direct appeals to voters have required an infusion of money that the association hasn’t done in such quantities before, DeFife said. Usually the group assists with research and support.

The association has funneled $100,000 into the Keep Denver Competitive war chest, which held a total of $642,390 as of Oct. 17.

Other big contributors are the Metropolitan Denver Hotel Association, with $28,000, and Hospitality Issue PAC — the political-advocacy arm of the Colorado Restaurant Association — with $180,000. The national association provides a large share of the local association’s contributions.

Erin Bennett, 9to5 Colorado director and spokeswoman for the Campaign for a Healthy Denver, said her group is up against a $600 billion industry, adding, “This is not about our neighborhood burger joint.”

So far, the national 9to5 organization and its associated group Family Values@Work — both based in Milwaukee at the same address — have donated a total of $105,000 to the proponents’ campaign. Bennett said the 9to5 money was raised in Colorado.

The only other financial contributors — whose combined donations totaled $325 — were an individual and the Denver Newspaper Guild. The guild’s members include various groups of employees at The Denver Post.

The Guild contribution was authorized by its non-newsroom units.

Backers of Initiative 300, which supporters call a “common sense policy” that improves health, helps working families and expands the economy, also includes several dozen community organizations.

Bennett said her group started thinking about focusing on Denver after two failed attempts to get a statewide measure through the legislature in 2009 and 2010.

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